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首页> 外文期刊>Journal of Nuclear Materials: Materials Aspects of Fission and Fusion >Comparison between 2D simulation and the standard 2-point model for scrape-off layer transport including effects of spatially varying transport coefficients
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Comparison between 2D simulation and the standard 2-point model for scrape-off layer transport including effects of spatially varying transport coefficients

机译：刮擦层传输的2D模拟与标准2点模型之间的比较，包括空间变化的传输系数的影响

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摘要

The effect of 2D transport in the tokamak scrape-off layer (SOL) on relating measured divertor heat-flux profiles to midplane plasma profiles is explored with the UEDGE code for a range of transport assumptions. The relationship between the divertor heat-flux profile and the midplane plasma temperature profile as determined from UEDGE is compared to commonly used predictions from 1D and "2-point" analytic relation. Results show that the parametric variation in λq, _(div) with midplane separatrix values follows the conduction-limited 2-point model, though the actual value of q _(//) on a given flux surface is much lower than implied by the midplane Te, _(sep), and λq, _(div) is ～ twice as wide as expected from these models. Poloidal variations in χ result in minimal change to radial profiles and probably can't be distinguished experimentally from cases with uniform χ having the same flux-surface average value.
机译：使用UEDGE代码探索了托卡马克刮除层（SOL）中2D传输对所测得的偏滤器热通量剖面与中平面等离子体剖面的相关性的影响，从而得出了一系列的传输假设。将根据UEDGE确定的偏滤器热通量曲线和中平面等离子体温度曲线之间的关系与根据1D和“ 2点”分析关系得出的常用预测进行比较。结果表明，尽管中给定通量表面q _（//）的实际值远低于导通极限两点模型，但具有中平面分离线值的λq，_（div）的参数变化遵循传导受限的两点模型。 Te，_（sep）和λq，_（div）的中平面的宽度是这些模型预期的两倍。 χ的极向变化导致径向轮廓的变化最小，并且可能无法通过实验将其与均匀χ具有相同通量表面平均值的情况区分开。

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